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Title: BogoMIPS Author: Sandro Tosi Last modified: 2005-09-20 Linux kernel set itself up at boot-time gathering information from the hardware on which it's running. BogoMIPS are a metric unit used to synchronize scheduler and internal kernel timers. They have no real value but they are just a value to setup the kernel. They are named BogoMIPS, not PIPS... Do not use BogoMIPS as a performance value: you cannot compare different processors or architecture with them. They depends on processor frequency, for the same architecture. On recent popular CPUs, BogoMIPS are approximately twice the megahertz of the CPU, but this may vary a lot. In and SMP environment (Symmetrical MultiProcessor) only the first processor contributes to setup kernel, but BogoMIPS are calculated even for the second one and a total from the machine is computed, as from this /var/log/kern.log extract: kernel: Detected 867.646 MHz processor. kernel: Calibrating delay loop... 1716.22 BogoMIPS (lpj=858112) kernel: Calibrating delay loop... 1728.51 BogoMIPS (lpj=864256) kernel: Total of 2 processors activated (3444.73 BogoMIPS). Wim van Dorst has written a detailed ``BogoMIPS mini-Howto'', available at http://www.hobby.nl/~clifton/bogomips.html